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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">&#26631;&#20934;&#24211;&#22836;&#25991;&#20214;</span> &lt;memory_resource&gt;</h1>
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<p>&#27492;&#22836;&#25991;&#20214;&#26159;<a href="cpp-memory.html">&#21160;&#24577;&#20869;&#23384;&#31649;&#29702;</a>&#24211;&#30340;&#19968;&#37096;&#20998;&#12290;</p>
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<h3><span class="mw-headline" id=".E7.B1.BB">&#31867;</span></h3>
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<div>&#23450;&#20041;&#20110;&#21629;&#21517;&#31354;&#38388; <code>std::pmr</code></div>
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<div><a href="cpp-memory-polymorphic_allocator.html"><span class="t-lines"><span>polymorphic_allocator</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
</div>
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<td>&#20197; <span class="t-lc">std::memory_resource</span> &#26500;&#36896;&#65292;&#25903;&#25345;&#22522;&#20110;&#23427;&#30340;&#36816;&#34892;&#26102;&#22810;&#24577;&#30340;&#20998;&#37197;&#22120;<br />
<span class="t-mark">(&#31867;&#27169;&#26495;)</span></td>
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<div><a href="cpp-memory-memory_resource.html"><span class="t-lines"><span>memory_resource</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
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<td>&#19968;&#20010;&#25277;&#35937;&#25509;&#21475;&#65292;&#29992;&#20110;&#21508;&#31181;&#23553;&#35013;&#20869;&#23384;&#36164;&#28304;&#30340;&#31867;<br />
<span class="t-mark">(&#31867;)</span></td>
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<div><a href="cpp-memory-pool_options.html"><span class="t-lines"><span>pool_options</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
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<td>&#19968;&#32452;&#27744;&#36164;&#28304;&#30340;&#26500;&#36896;&#20989;&#25968;&#36873;&#39033;<br />
<span class="t-mark">(&#31867;)</span></td>
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<div><a href="cpp-memory-synchronized_pool_resource.html"><span class="t-lines"><span>synchronized_pool_resource</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
</div>
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<td>&#32447;&#31243;&#23433;&#20840;&#30340; <span class="t-lc"><a href="cpp-memory-memory_resource.html">std::pmr::memory_resource</a></span>&#65292;&#29992;&#20110;&#31649;&#29702;&#20855;&#26377;&#19981;&#21516;&#22359;&#22823;&#23567;&#30340;&#27744;&#20013;&#30340;&#20998;&#37197;<br />
<span class="t-mark">(&#31867;)</span></td>
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<div><a href="cpp-memory-unsynchronized_pool_resource.html"><span class="t-lines"><span>unsynchronized_pool_resource</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
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<td>&#32447;&#31243;&#19981;&#23433;&#20840;&#30340; <span class="t-lc"><a href="cpp-memory-memory_resource.html">std::pmr::memory_resource</a></span>&#65292;&#29992;&#20110;&#31649;&#29702;&#20855;&#26377;&#19981;&#21516;&#22359;&#22823;&#23567;&#30340;&#27744;&#20013;&#30340;&#20998;&#37197;<br />
<span class="t-mark">(&#31867;)</span></td>
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<div><a href="cpp-memory-monotonic_buffer_resource.html"><span class="t-lines"><span>monotonic_buffer_resource</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
</div>
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<td>&#19968;&#31181;&#29305;&#27530;&#29992;&#36884;&#30340; <span class="t-lc"><a href="cpp-memory-memory_resource.html">std::pmr::memory_resource</a></span>&#65292;&#20165;&#22312;&#36164;&#28304;&#34987;&#38144;&#27585;&#26102;&#25165;&#37322;&#25918;&#25152;&#20998;&#37197;&#20869;&#23384;<br />
<span class="t-mark">(&#31867;)</span></td>
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<h3><span class="mw-headline" id=".E5.87.BD.E6.95.B0">&#20989;&#25968;</span></h3>
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<div>&#23450;&#20041;&#20110;&#21629;&#21517;&#31354;&#38388; <code>std::pmr</code></div>
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<div><a href="cpp-memory-new_delete_resource.html"><span class="t-lines"><span>new_delete_resource</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
</div>
</td>
<td>&#36820;&#22238;&#19968;&#20010;&#38745;&#24577;&#30340;&#31243;&#24207;&#33539;&#22260; <span class="t-lc"><a href="cpp-memory-memory_resource.html">std::pmr::memory_resource</a></span>&#65292;&#23427;&#20351;&#29992;&#20840;&#23616; <span class="t-lc"><a href="cpp-memory-new-operator_new.html">operator new</a></span> &#19982; <span class="t-lc"><a href="cpp-memory-new-operator_delete.html">operator delete</a></span> &#20998;&#37197;&#21644;&#35299;&#20998;&#37197;&#20869;&#23384;<br />
<span class="t-mark">(&#20989;&#25968;)</span></td>
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<div><a href="cpp-memory-null_memory_resource.html"><span class="t-lines"><span>null_memory_resource</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
</div>
</td>
<td>&#36820;&#22238;&#19968;&#20010;&#19981;&#36827;&#34892;&#20219;&#20309;&#20998;&#37197;&#30340;&#38745;&#24577; <span class="t-lc"><a href="cpp-memory-memory_resource.html">std::pmr::memory_resource</a></span><br />
<span class="t-mark">(&#20989;&#25968;)</span></td>
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<div><a href="cpp-memory-get_default_resource.html"><span class="t-lines"><span>get_default_resource</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
</div>
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<td>&#33719;&#21462;&#32570;&#30465; <span class="t-lc"><a href="cpp-memory-memory_resource.html">std::pmr::memory_resource</a></span><br />
<span class="t-mark">(&#20989;&#25968;)</span></td>
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<div><a href="cpp-memory-set_default_resource.html"><span class="t-lines"><span>set_default_resource</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
</div>
</td>
<td>&#35774;&#32622;&#32570;&#30465; <span class="t-lc"><a href="cpp-memory-memory_resource.html">std::pmr::memory_resource</a></span><br />
<span class="t-mark">(&#20989;&#25968;)</span></td>
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<h3><span class="mw-headline" id=".E6.A6.82.E8.A6.81">&#27010;&#35201;</span></h3>
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<div class="cpp source-cpp">
<pre class="de1"><span class="kw1">namespace</span> std<span class="sy4">::</span><span class="me2">pmr</span> <span class="br0">{</span>
<span class="co1">// &#31867; memory_resource</span>
<span class="kw1">class</span> memory_resource<span class="sy4">;</span>
<span class="kw4">bool</span> operator<span class="sy1">==</span><span class="br0">(</span><span class="kw4">const</span> memory_resource<span class="sy3">&amp;</span> a, <span class="kw4">const</span> memory_resource<span class="sy3">&amp;</span> b<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="co1">// &#31867;&#27169;&#26495; polymorphic_allocator</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> Tp<span class="sy1">&gt;</span> <span class="kw1">class</span> polymorphic_allocator<span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> T1, <span class="kw1">class</span> T2<span class="sy1">&gt;</span>
<span class="kw4">bool</span> operator<span class="sy1">==</span><span class="br0">(</span><span class="kw4">const</span> polymorphic_allocator<span class="sy1">&lt;</span>T1<span class="sy1">&gt;</span><span class="sy3">&amp;</span> a,
<span class="kw4">const</span> polymorphic_allocator<span class="sy1">&lt;</span>T2<span class="sy1">&gt;</span><span class="sy3">&amp;</span> b<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="co1">// &#20840;&#23616;&#20869;&#23384;&#36164;&#28304;</span>
memory_resource<span class="sy2">*</span> new_delete_resource<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
memory_resource<span class="sy2">*</span> null_memory_resource<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
memory_resource<span class="sy2">*</span> set_default_resource<span class="br0">(</span>memory_resource<span class="sy2">*</span> r<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
memory_resource<span class="sy2">*</span> get_default_resource<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="co1">// &#27744;&#36164;&#28304;&#31867;</span>
<span class="kw1">struct</span> pool_options<span class="sy4">;</span>
<span class="kw1">class</span> synchronized_pool_resource<span class="sy4">;</span>
<span class="kw1">class</span> unsynchronized_pool_resource<span class="sy4">;</span>
<span class="kw1">class</span> monotonic_buffer_resource<span class="sy4">;</span>
<span class="br0">}</span></pre></div>
</div>
<h4><span class="mw-headline" id=".E7.B1.BB_std::pmr::memory_resource">&#31867; <span class="t-lc"><a href="cpp-memory-memory_resource.html">std::pmr::memory_resource</a></span></span></h4>
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<div class="cpp source-cpp">
<pre class="de1"><span class="kw1">namespace</span> std<span class="sy4">::</span><span class="me2">pmr</span> <span class="br0">{</span>
<span class="kw1">class</span> memory_resource <span class="br0">{</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> size_t max_align <span class="sy1">=</span> alignof<span class="br0">(</span>max_align_t<span class="br0">)</span><span class="sy4">;</span> <span class="co1">// &#20165;&#29992;&#20110;&#38416;&#37322;</span>
<span class="kw1">public</span><span class="sy4">:</span>
memory_resource<span class="br0">(</span><span class="br0">)</span> <span class="sy1">=</span> <span class="kw1">default</span><span class="sy4">;</span>
memory_resource<span class="br0">(</span><span class="kw4">const</span> memory_resource<span class="sy3">&amp;</span><span class="br0">)</span> <span class="sy1">=</span> <span class="kw1">default</span><span class="sy4">;</span>
<span class="kw1">virtual</span> ~memory_resource<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
memory_resource<span class="sy3">&amp;</span> operator<span class="sy1">=</span><span class="br0">(</span><span class="kw4">const</span> memory_resource<span class="sy3">&amp;</span><span class="br0">)</span> <span class="sy1">=</span> <span class="kw1">default</span><span class="sy4">;</span>
<span class="br0">[</span><span class="br0">[</span>nodiscard<span class="br0">]</span><span class="br0">]</span> <span class="kw4">void</span><span class="sy2">*</span> allocate<span class="br0">(</span>size_t bytes, size_t alignment <span class="sy1">=</span> max_align<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">void</span> deallocate<span class="br0">(</span><span class="kw4">void</span><span class="sy2">*</span> p, size_t bytes, size_t alignment <span class="sy1">=</span> max_align<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">bool</span> is_equal<span class="br0">(</span><span class="kw4">const</span> memory_resource<span class="sy3">&amp;</span> other<span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw1">private</span><span class="sy4">:</span>
<span class="kw1">virtual</span> <span class="kw4">void</span><span class="sy2">*</span> do_allocate<span class="br0">(</span>size_t bytes, size_t alignment<span class="br0">)</span> <span class="sy1">=</span> <span class="nu0">0</span><span class="sy4">;</span>
<span class="kw1">virtual</span> <span class="kw4">void</span> do_deallocate<span class="br0">(</span><span class="kw4">void</span><span class="sy2">*</span> p, size_t bytes, size_t alignment<span class="br0">)</span> <span class="sy1">=</span> <span class="nu0">0</span><span class="sy4">;</span>
<span class="kw1">virtual</span> <span class="kw4">bool</span> do_is_equal<span class="br0">(</span><span class="kw4">const</span> memory_resource<span class="sy3">&amp;</span> other<span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span> <span class="sy1">=</span> <span class="nu0">0</span><span class="sy4">;</span>
<span class="br0">}</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div>
</div>
<h4><span class="mw-headline" id=".E7.B1.BB.E6.A8.A1.E6.9D.BF_std::pmr::polymorphic_allocator">&#31867;&#27169;&#26495; <span class="t-lc"><a href="cpp-memory-polymorphic_allocator.html">std::pmr::polymorphic_allocator</a></span></span></h4>
<div dir="ltr" class="mw-geshi" style="text-align: left;">
<div class="cpp source-cpp">
<pre class="de1"><span class="kw1">namespace</span> std<span class="sy4">::</span><span class="me2">pmr</span> <span class="br0">{</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> Tp <span class="sy1">=</span> byte<span class="sy1">&gt;</span> <span class="kw1">class</span> polymorphic_allocator <span class="br0">{</span>
memory_resource<span class="sy2">*</span> memory_rsrc<span class="sy4">;</span> <span class="co1">// &#20165;&#29992;&#20110;&#38416;&#37322;</span>
<span class="kw1">public</span><span class="sy4">:</span>
<span class="kw1">using</span> value_type <span class="sy1">=</span> Tp<span class="sy4">;</span>
<span class="co1">// &#26500;&#36896;&#20989;&#25968;</span>
polymorphic_allocator<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
polymorphic_allocator<span class="br0">(</span>memory_resource<span class="sy2">*</span> r<span class="br0">)</span><span class="sy4">;</span>
polymorphic_allocator<span class="br0">(</span><span class="kw4">const</span> polymorphic_allocator<span class="sy3">&amp;</span> other<span class="br0">)</span> <span class="sy1">=</span> <span class="kw1">default</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> U<span class="sy1">&gt;</span>
polymorphic_allocator<span class="br0">(</span><span class="kw4">const</span> polymorphic_allocator<span class="sy1">&lt;</span>U<span class="sy1">&gt;</span><span class="sy3">&amp;</span> other<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
polymorphic_allocator<span class="sy3">&amp;</span> operator<span class="sy1">=</span><span class="br0">(</span><span class="kw4">const</span> polymorphic_allocator<span class="sy3">&amp;</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
<span class="co1">// &#25104;&#21592;&#20989;&#25968;</span>
<span class="br0">[</span><span class="br0">[</span>nodiscard<span class="br0">]</span><span class="br0">]</span> Tp<span class="sy2">*</span> allocate<span class="br0">(</span>size_t n<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">void</span> deallocate<span class="br0">(</span>Tp<span class="sy2">*</span> p, size_t n<span class="br0">)</span><span class="sy4">;</span>
<span class="br0">[</span><span class="br0">[</span>nodiscard<span class="br0">]</span><span class="br0">]</span> <span class="kw4">void</span><span class="sy2">*</span> allocate_bytes<span class="br0">(</span>size_t nbytes,
size_t alignment <span class="sy1">=</span> alignof<span class="br0">(</span>max_align_t<span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">void</span> deallocate_bytes<span class="br0">(</span><span class="kw4">void</span><span class="sy2">*</span> p, size_t nbytes, size_t alignment <span class="sy1">=</span> alignof<span class="br0">(</span>max_align_t<span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> T<span class="sy1">&gt;</span> <span class="br0">[</span><span class="br0">[</span>nodiscard<span class="br0">]</span><span class="br0">]</span> T<span class="sy2">*</span> allocate_object<span class="br0">(</span>size_t n <span class="sy1">=</span> <span class="nu0">1</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> T<span class="sy1">&gt;</span> <span class="kw4">void</span> deallocate_object<span class="br0">(</span>T<span class="sy2">*</span> p, size_t n <span class="sy1">=</span> <span class="nu0">1</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> T, <span class="kw1">class</span>... <span class="me1">CtorArgs</span><span class="sy1">&gt;</span>
<span class="br0">[</span><span class="br0">[</span>nodiscard<span class="br0">]</span><span class="br0">]</span> T<span class="sy2">*</span> new_object<span class="br0">(</span>CtorArgs<span class="sy3">&amp;&amp;</span>... <span class="me1">ctor_args</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> T<span class="sy1">&gt;</span> <span class="kw4">void</span> delete_object<span class="br0">(</span>T<span class="sy2">*</span> p<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> T, <span class="kw1">class</span>... <span class="me1">Args</span><span class="sy1">&gt;</span>
<span class="kw4">void</span> construct<span class="br0">(</span>T<span class="sy2">*</span> p, Args<span class="sy3">&amp;&amp;</span>... <span class="me1">args</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> T<span class="sy1">&gt;</span>
<span class="kw4">void</span> destroy<span class="br0">(</span>T<span class="sy2">*</span> p<span class="br0">)</span><span class="sy4">;</span> <span class="co1">// &#24323;&#29992;</span>
polymorphic_allocator select_on_container_copy_construction<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
memory_resource<span class="sy2">*</span> resource<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="br0">}</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div>
</div>
<h4><span class="mw-headline" id=".E7.B1.BB_std::pmr::pool_options">&#31867; <span class="t-lc"><a href="cpp-memory-pool_options.html">std::pmr::pool_options</a></span></span></h4>
<div dir="ltr" class="mw-geshi" style="text-align: left;">
<div class="cpp source-cpp">
<pre class="de1"><span class="kw1">namespace</span> std<span class="sy4">::</span><span class="me2">pmr</span> <span class="br0">{</span>
<span class="kw1">struct</span> pool_options <span class="br0">{</span>
size_t max_blocks_per_chunk <span class="sy1">=</span> <span class="nu0">0</span><span class="sy4">;</span>
size_t largest_required_pool_block <span class="sy1">=</span> <span class="nu0">0</span><span class="sy4">;</span>
<span class="br0">}</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div>
</div>
<h4><span class="mw-headline" id=".E7.B1.BB_std::pmr::synchronized_pool_resource">&#31867; <span class="t-lc"><a href="cpp-memory-synchronized_pool_resource.html">std::pmr::synchronized_pool_resource</a></span></span></h4>
<div dir="ltr" class="mw-geshi" style="text-align: left;">
<div class="cpp source-cpp">
<pre class="de1"><span class="kw1">namespace</span> std<span class="sy4">::</span><span class="me2">pmr</span> <span class="br0">{</span>
<span class="kw1">class</span> synchronized_pool_resource <span class="sy4">:</span> <span class="kw1">public</span> memory_resource <span class="br0">{</span>
<span class="kw1">public</span><span class="sy4">:</span>
synchronized_pool_resource<span class="br0">(</span><span class="kw4">const</span> pool_options<span class="sy3">&amp;</span> opts, memory_resource<span class="sy2">*</span> upstream<span class="br0">)</span><span class="sy4">;</span>
synchronized_pool_resource<span class="br0">(</span><span class="br0">)</span>
<span class="sy4">:</span> synchronized_pool_resource<span class="br0">(</span>pool_options<span class="br0">(</span><span class="br0">)</span>, get_default_resource<span class="br0">(</span><span class="br0">)</span><span class="br0">)</span> <span class="br0">{</span><span class="br0">}</span>
<span class="kw1">explicit</span> synchronized_pool_resource<span class="br0">(</span>memory_resource<span class="sy2">*</span> upstream<span class="br0">)</span>
<span class="sy4">:</span> synchronized_pool_resource<span class="br0">(</span>pool_options<span class="br0">(</span><span class="br0">)</span>, upstream<span class="br0">)</span> <span class="br0">{</span><span class="br0">}</span>
<span class="kw1">explicit</span> synchronized_pool_resource<span class="br0">(</span><span class="kw4">const</span> pool_options<span class="sy3">&amp;</span> opts<span class="br0">)</span>
<span class="sy4">:</span> synchronized_pool_resource<span class="br0">(</span>opts, get_default_resource<span class="br0">(</span><span class="br0">)</span><span class="br0">)</span> <span class="br0">{</span><span class="br0">}</span>
synchronized_pool_resource<span class="br0">(</span><span class="kw4">const</span> synchronized_pool_resource<span class="sy3">&amp;</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
<span class="kw1">virtual</span> ~synchronized_pool_resource<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
synchronized_pool_resource<span class="sy3">&amp;</span> operator<span class="sy1">=</span><span class="br0">(</span><span class="kw4">const</span> synchronized_pool_resource<span class="sy3">&amp;</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
<span class="kw4">void</span> release<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
memory_resource<span class="sy2">*</span> upstream_resource<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
pool_options options<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="kw1">protected</span><span class="sy4">:</span>
<span class="kw4">void</span><span class="sy2">*</span> do_allocate<span class="br0">(</span>size_t bytes, size_t alignment<span class="br0">)</span> override<span class="sy4">;</span>
<span class="kw4">void</span> do_deallocate<span class="br0">(</span><span class="kw4">void</span><span class="sy2">*</span> p, size_t bytes, size_t alignment<span class="br0">)</span> override<span class="sy4">;</span>
<span class="kw4">bool</span> do_is_equal<span class="br0">(</span><span class="kw4">const</span> memory_resource<span class="sy3">&amp;</span> other<span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span> override<span class="sy4">;</span>
<span class="br0">}</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div>
</div>
<h4><span class="mw-headline" id=".E7.B1.BB_std::pmr::unsynchronized_pool_resource">&#31867; <span class="t-lc"><a href="cpp-memory-unsynchronized_pool_resource.html">std::pmr::unsynchronized_pool_resource</a></span></span></h4>
<div dir="ltr" class="mw-geshi" style="text-align: left;">
<div class="cpp source-cpp">
<pre class="de1"><span class="kw1">namespace</span> std<span class="sy4">::</span><span class="me2">pmr</span> <span class="br0">{</span>
<span class="kw1">class</span> unsynchronized_pool_resource <span class="sy4">:</span> <span class="kw1">public</span> memory_resource <span class="br0">{</span>
<span class="kw1">public</span><span class="sy4">:</span>
unsynchronized_pool_resource<span class="br0">(</span><span class="kw4">const</span> pool_options<span class="sy3">&amp;</span> opts, memory_resource<span class="sy2">*</span> upstream<span class="br0">)</span><span class="sy4">;</span>
unsynchronized_pool_resource<span class="br0">(</span><span class="br0">)</span>
<span class="sy4">:</span> unsynchronized_pool_resource<span class="br0">(</span>pool_options<span class="br0">(</span><span class="br0">)</span>, get_default_resource<span class="br0">(</span><span class="br0">)</span><span class="br0">)</span> <span class="br0">{</span><span class="br0">}</span>
<span class="kw1">explicit</span> unsynchronized_pool_resource<span class="br0">(</span>memory_resource<span class="sy2">*</span> upstream<span class="br0">)</span>
<span class="sy4">:</span> unsynchronized_pool_resource<span class="br0">(</span>pool_options<span class="br0">(</span><span class="br0">)</span>, upstream<span class="br0">)</span> <span class="br0">{</span><span class="br0">}</span>
<span class="kw1">explicit</span> unsynchronized_pool_resource<span class="br0">(</span><span class="kw4">const</span> pool_options<span class="sy3">&amp;</span> opts<span class="br0">)</span>
<span class="sy4">:</span> unsynchronized_pool_resource<span class="br0">(</span>opts, get_default_resource<span class="br0">(</span><span class="br0">)</span><span class="br0">)</span> <span class="br0">{</span><span class="br0">}</span>
unsynchronized_pool_resource<span class="br0">(</span><span class="kw4">const</span> unsynchronized_pool_resource<span class="sy3">&amp;</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
<span class="kw1">virtual</span> ~unsynchronized_pool_resource<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
unsynchronized_pool_resource<span class="sy3">&amp;</span> operator<span class="sy1">=</span><span class="br0">(</span><span class="kw4">const</span> unsynchronized_pool_resource<span class="sy3">&amp;</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
<span class="kw4">void</span> release<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
memory_resource<span class="sy2">*</span> upstream_resource<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
pool_options options<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="kw1">protected</span><span class="sy4">:</span>
<span class="kw4">void</span><span class="sy2">*</span> do_allocate<span class="br0">(</span>size_t bytes, size_t alignment<span class="br0">)</span> override<span class="sy4">;</span>
<span class="kw4">void</span> do_deallocate<span class="br0">(</span><span class="kw4">void</span><span class="sy2">*</span> p, size_t bytes, size_t alignment<span class="br0">)</span> override<span class="sy4">;</span>
<span class="kw4">bool</span> do_is_equal<span class="br0">(</span><span class="kw4">const</span> memory_resource<span class="sy3">&amp;</span> other<span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span> override<span class="sy4">;</span>
<span class="br0">}</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div>
</div>
<h4><span class="mw-headline" id=".E7.B1.BB_std::pmr::monotonic_buffer_resource">&#31867; <span class="t-lc"><a href="cpp-memory-monotonic_buffer_resource.html">std::pmr::monotonic_buffer_resource</a></span></span></h4>
<div dir="ltr" class="mw-geshi" style="text-align: left;">
<div class="cpp source-cpp">
<pre class="de1"><span class="kw1">namespace</span> std<span class="sy4">::</span><span class="me2">pmr</span> <span class="br0">{</span>
<span class="kw1">class</span> monotonic_buffer_resource <span class="sy4">:</span> <span class="kw1">public</span> memory_resource <span class="br0">{</span>
memory_resource<span class="sy2">*</span> upstream_rsrc<span class="sy4">;</span> <span class="co1">// &#20165;&#29992;&#20110;&#38416;&#37322;</span>
<span class="kw4">void</span><span class="sy2">*</span> current_buffer<span class="sy4">;</span> <span class="co1">// &#20165;&#29992;&#20110;&#38416;&#37322;</span>
size_t next_buffer_size<span class="sy4">;</span> <span class="co1">// &#20165;&#29992;&#20110;&#38416;&#37322;</span>
<span class="kw1">public</span><span class="sy4">:</span>
<span class="kw1">explicit</span> monotonic_buffer_resource<span class="br0">(</span>memory_resource<span class="sy2">*</span> upstream<span class="br0">)</span><span class="sy4">;</span>
monotonic_buffer_resource<span class="br0">(</span>size_t initial_size, memory_resource<span class="sy2">*</span> upstream<span class="br0">)</span><span class="sy4">;</span>
monotonic_buffer_resource<span class="br0">(</span><span class="kw4">void</span><span class="sy2">*</span> buffer, size_t buffer_size, memory_resource<span class="sy2">*</span> upstream<span class="br0">)</span><span class="sy4">;</span>
monotonic_buffer_resource<span class="br0">(</span><span class="br0">)</span>
<span class="sy4">:</span> monotonic_buffer_resource<span class="br0">(</span>get_default_resource<span class="br0">(</span><span class="br0">)</span><span class="br0">)</span> <span class="br0">{</span><span class="br0">}</span>
<span class="kw1">explicit</span> monotonic_buffer_resource<span class="br0">(</span>size_t initial_size<span class="br0">)</span>
<span class="sy4">:</span> monotonic_buffer_resource<span class="br0">(</span>initial_size, get_default_resource<span class="br0">(</span><span class="br0">)</span><span class="br0">)</span> <span class="br0">{</span><span class="br0">}</span>
monotonic_buffer_resource<span class="br0">(</span><span class="kw4">void</span><span class="sy2">*</span> buffer, size_t buffer_size<span class="br0">)</span>
<span class="sy4">:</span> monotonic_buffer_resource<span class="br0">(</span>buffer, buffer_size, get_default_resource<span class="br0">(</span><span class="br0">)</span><span class="br0">)</span> <span class="br0">{</span><span class="br0">}</span>
monotonic_buffer_resource<span class="br0">(</span><span class="kw4">const</span> monotonic_buffer_resource<span class="sy3">&amp;</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
<span class="kw1">virtual</span> ~monotonic_buffer_resource<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
monotonic_buffer_resource<span class="sy3">&amp;</span> operator<span class="sy1">=</span><span class="br0">(</span><span class="kw4">const</span> monotonic_buffer_resource<span class="sy3">&amp;</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
<span class="kw4">void</span> release<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
memory_resource<span class="sy2">*</span> upstream_resource<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="kw1">protected</span><span class="sy4">:</span>
<span class="kw4">void</span><span class="sy2">*</span> do_allocate<span class="br0">(</span>size_t bytes, size_t alignment<span class="br0">)</span> override<span class="sy4">;</span>
<span class="kw4">void</span> do_deallocate<span class="br0">(</span><span class="kw4">void</span><span class="sy2">*</span> p, size_t bytes, size_t alignment<span class="br0">)</span> override<span class="sy4">;</span>
<span class="kw4">bool</span> do_is_equal<span class="br0">(</span><span class="kw4">const</span> memory_resource<span class="sy3">&amp;</span> other<span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span> override<span class="sy4">;</span>
<span class="br0">}</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div>
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